Thermal runaway control methods and control devices, battery systems and storage media

Abstract

This application discloses a thermal runaway control method and control device, a battery system, and a storage medium. The method includes obtaining a pre-activation request from the thermal management system of the battery system, wherein the pre-activation request indicates that the energy storage battery of the battery system has met the thermal runaway warning conditions but has not met the thermal runaway alarm conditions; in response to the pre-activation request, controlling the thermal management system to circulate cooling of the energy storage battery at a first cooling power; if the energy storage battery has not met the thermal runaway alarm conditions and the sampled temperature is less than or equal to a temperature threshold, controlling the thermal management system to stop circulating cooling of the energy storage battery; and if, within a preset time period, it is determined that the energy storage battery has met the thermal runaway alarm conditions, controlling the thermal management system to circulate cooling of the energy storage battery at a second cooling power. This method, in the event of thermal runaway of the energy storage battery, controls the thermal management system to circulate cooling of the energy storage battery at a higher cooling power, which helps to reduce the safety risks of the energy storage battery.

Description

Technical Field

[0001] This application belongs to the field of thermal management technology, and in particular relates to a thermal runaway control method and control device, battery system and storage medium. Background Technology

[0002] With the increasing severity of global environmental and energy issues, the international electric vehicle industry is developing rapidly. Battery systems, including energy storage batteries, are being widely used in people's lives and production today, such as electric vehicles and energy storage systems.

[0003] Currently, with the increasing demand for energy storage batteries, the energy density requirements are becoming higher, and the frequency of thermal runaway is also increasing. During thermal runaway, energy storage batteries release a large amount of heat, causing a sharp rise in battery temperature and increasing safety risks. Therefore, reducing the safety risks of energy storage batteries has become an urgent problem to be solved. Summary of the Invention

[0004] In view of the above, embodiments of this application provide a thermal runaway control method and control device, battery system and storage medium to overcome the problems of the prior art.

[0005] In a first aspect, embodiments of this application provide a thermal runaway control method, including:

[0006] Obtain a pre-start request for the thermal management system of the battery system. The pre-start request is used to indicate that the energy storage battery of the battery system has met the thermal runaway warning condition and has not met the thermal runaway alarm condition. The thermal runaway warning condition is that at least one of the multiple sampling parameters of the battery system is an abnormal parameter. The thermal runaway alarm condition is that each of the multiple sampling parameters is the abnormal parameter.

[0007] In response to the pre-activation request, the thermal management system is controlled to circulate and cool the energy storage battery at a first cooling power.

[0008] If the energy storage battery does not meet the thermal runaway alarm conditions, and the sampling temperature among the multiple sampling parameters is less than or equal to the temperature threshold, the thermal management system is controlled to stop circulating cooling of the energy storage battery.

[0009] If the energy storage battery meets the thermal runaway alarm conditions within a preset time period, the thermal management system is controlled to circulate and cool the energy storage battery with a second cooling power, wherein the first cooling power is less than the second cooling power.

[0010] The solution provided in this application controls the thermal management system to circulate and cool the energy storage battery with a large cooling power in the event of thermal runaway, which can quickly reduce the battery temperature and help reduce the safety risks of the energy storage battery.

[0011] In the absence of thermal runaway in the energy storage battery and when the sampling parameters are abnormal, controlling the thermal management system to circulate and cool the energy storage battery with a smaller cooling power can suppress the problem of the energy storage battery being severely damaged due to temperature rise before thermal runaway is detected, which is conducive to further reducing the safety risks of the energy storage battery.

[0012] If the energy storage battery does not experience thermal runaway and the sampling temperature is less than or equal to the temperature threshold, the thermal management system stops working, reducing the power consumption of the battery system and improving the energy efficiency of the battery system.

[0013] In some optional embodiments, the thermal runaway control method further includes:

[0014] If, within the preset time period, it is determined that the energy storage battery does not meet the thermal runaway alarm conditions, the thermal management system is controlled to stop circulating cooling of the energy storage battery.

[0015] The solution provided in this embodiment controls the thermal management system to stop working if the energy storage battery does not experience thermal runaway within a preset time period, thereby reducing the power consumption of the battery system and improving the energy efficiency of the battery system.

[0016] In some optional embodiments, the battery system is an electric vehicle. After determining that the energy storage battery has met the thermal runaway alarm conditions within a preset time period, and controlling the thermal management system to circulate and cool the energy storage battery with a second cooling power, the thermal runaway control method further includes:

[0017] Determine the vehicle status of the electric vehicle;

[0018] When the vehicle is determined to be in a driving state, the braking system of the electric vehicle is controlled to brake the electric vehicle.

[0019] The solution provided in this embodiment can brake the electric vehicle when the energy storage battery of the electric vehicle experiences thermal runaway and the electric vehicle is in motion, thereby suppressing the occurrence of collision accidents caused by thermal runaway and improving the driving safety of the electric vehicle.

[0020] In some optional embodiments, before controlling the thermal management system to cyclically cool the energy storage battery with a first cooling power in response to the pre-activation request, the thermal runaway control method further includes:

[0021] The low-voltage power supply or high-voltage power supply or engine of the battery system is controlled to supply power to the thermal management system, so that the thermal management system switches from the shutdown state to the working state.

[0022] The solution provided in this embodiment controls the thermal management system to be in a power-off state before the thermal runaway warning occurs, which can reduce the power consumption of the battery system. In the event of a thermal runaway warning, the low-voltage power supply, high-voltage power supply, or engine is controlled to provide power to the thermal management system, so that the thermal management system switches from the shutdown state to the working state, which helps to improve the control success rate of the thermal management system.

[0023] In some optional embodiments, obtaining the pre-activation request of the battery system's thermal management system includes:

[0024] Acquire the multiple sampling parameters collected by the battery management system;

[0025] If the multiple sampling parameters meet the thermal runaway early warning conditions but do not meet the thermal runaway alarm conditions, the pre-activation request is generated.

[0026] The solution provided in this embodiment generates a pre-opening request when it is determined that multiple sampling parameters have met the thermal runaway early warning conditions but have not met the thermal runaway alarm conditions. This helps to improve the accuracy of obtaining the pre-opening request.

[0027] In some optional embodiments, obtaining the pre-activation request of the battery system's thermal management system includes:

[0028] The battery management system receives a pre-activation request, which is generated by the battery management system after determining that the collected sampling parameters meet the thermal runaway early warning conditions but do not meet the thermal runaway alarm conditions.

[0029] The solution provided in this embodiment obtains a pre-activation request from the battery management system. The pre-activation request is generated by the battery management system when it determines that multiple sampled parameters have met the thermal runaway early warning conditions but have not met the thermal runaway alarm conditions. This helps to improve the accuracy of obtaining the pre-activation request.

[0030] In some optional embodiments, the thermal runaway control method further includes:

[0031] If it is determined that the energy storage battery has met the thermal runaway alarm conditions, an alarm message is generated and sent to a preset client.

[0032] The solution provided in this embodiment generates and sends alarm information to a preset client when it is determined that the energy storage battery has met the thermal runaway alarm conditions, so as to remind the user to handle the energy storage battery according to the alarm information, which helps to improve the operational safety of the battery system.

[0033] Secondly, embodiments of this application provide a thermal runaway control device, comprising:

[0034] The acquisition module is used to acquire the pre-start request of the thermal management system of the battery system. The pre-start request is used to indicate that the energy storage battery of the battery system has met the thermal runaway warning condition and has not met the thermal runaway alarm condition. The thermal runaway warning condition is that at least one of the multiple sampling parameters of the battery system is an abnormal parameter, and the thermal runaway alarm condition is that each of the multiple sampling parameters is the abnormal parameter.

[0035] The first control module is configured to, in response to the pre-activation request, control the thermal management system to circulate and cool the energy storage battery with a first cooling power.

[0036] The second control module is used to control the thermal management system to stop circulating cooling of the energy storage battery when the energy storage battery does not meet the thermal runaway alarm conditions and the sampling temperature among the plurality of sampling parameters is less than or equal to the temperature threshold.

[0037] The third control module is used to control the thermal management system to circulate and cool the energy storage battery with a second cooling power when the energy storage battery meets the thermal runaway alarm conditions within a preset time period, wherein the first cooling power is less than the second cooling power.

[0038] Thirdly, embodiments of this application provide a battery system, including:

[0039] Memory;

[0040] One or more processors are coupled to the memory;

[0041] One or more applications, wherein the one or more applications are stored in the memory and configured to be executed by the one or more processors, the one or more applications being configured to perform the thermal runaway control method as provided in the first aspect above.

[0042] Fourthly, embodiments of this application provide a computer-readable storage medium storing program code, which can be invoked by a processor to execute the thermal runaway control method provided in the first aspect above.

[0043] Fifthly, embodiments of this application provide a computer program product that, when run on a computer device, causes the computer device to execute the thermal runaway control method provided in the first aspect above.

[0044] It is understood that the beneficial effects of the second to fifth aspects mentioned above can be found in the relevant descriptions in the first aspect mentioned above, and will not be repeated here. Attached Figure Description

[0045] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments or exemplary technologies will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0046] Figure 1 A schematic diagram of a battery system provided in an embodiment of this application is shown.

[0047] Figure 2 A schematic flowchart of a thermal runaway control method provided in an embodiment of this application is shown.

[0048] Figure 3 This paper illustrates another flowchart of the thermal runaway control method provided in an embodiment of this application.

[0049] Figure 4 This illustration shows a scenario flow diagram of the thermal runaway control method provided in an embodiment of this application.

[0050] Figure 5 This illustration shows another schematic flowchart of the thermal runaway control method provided in an embodiment of this application.

[0051] Figure 6 This illustration shows another schematic flowchart of the thermal runaway control method provided in an embodiment of this application.

[0052] Figure 7 A structural block diagram of a thermal runaway control device provided in an embodiment of this application is shown.

[0053] Figure 8 A functional block diagram of a battery system provided in an embodiment of this application is shown.

[0054] Figure 9This application illustrates a computer-readable storage medium for storing or carrying program code that implements the thermal runaway control method provided in this application.

[0055] Figure 10 This application illustrates a computer program product for storing or carrying program code that implements the thermal runaway control method provided in the embodiments of this application. Detailed Implementation

[0056] To make the objectives, features, and advantages of this application more apparent and understandable, the technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the embodiments described below are only some embodiments of this application, and not all embodiments. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0057] It should be understood that, when used in this specification and the appended claims, the term "comprising" indicates the presence of the described features, integrals, steps, operations, elements and / or components, but does not exclude the presence or addition of one or more other features, integrals, steps, operations, elements, components and / or collections thereof.

[0058] It should also be understood that the terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to limit the scope of the application. As used in this specification and the appended claims, the singular forms “a,” “an,” and “the” are intended to include the plural forms unless the context clearly indicates otherwise.

[0059] It should also be further understood that the term “and / or” as used in this application specification and the appended claims means any combination of one or more of the associated listed items and all possible combinations, and includes such combinations.

[0060] Furthermore, in the description of this application, the terms "first," "second," "third," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0061] With the increasing severity of global environmental and energy issues, the international electric vehicle industry is developing rapidly. Battery systems, including energy storage batteries, are being widely used in people's lives and production today, such as electric vehicles and energy storage systems.

[0062] Currently, with the increasing demand for energy storage batteries, the energy density requirements are becoming higher, and the frequency of thermal runaway is also increasing. During thermal runaway, energy storage batteries release a large amount of heat, causing a sharp rise in battery temperature and increasing safety risks. Therefore, reducing the safety risks of energy storage batteries has become an urgent problem to be solved.

[0063] To address the aforementioned issues, the thermal runaway control method and control device, battery system, and storage medium provided in this application embodiment acquire a pre-activation request from the thermal management system of the battery system. This pre-activation request indicates that the energy storage battery of the battery system has met the thermal runaway warning condition but not the thermal runaway alarm condition. The thermal runaway warning condition is that at least one of the multiple sampling parameters of the battery system is an abnormal parameter, and the thermal runaway alarm condition is that each of the multiple sampling parameters is an abnormal parameter. In response to the pre-activation request, the thermal management system is controlled to circulate cooling of the energy storage battery with a first cooling power. If the energy storage battery does not meet the thermal runaway alarm condition and the sampling temperature of the multiple sampling parameters is less than or equal to a temperature threshold, the thermal management system stops circulating cooling of the energy storage battery. If, within a preset time period, the energy storage battery meets the thermal runaway alarm condition, the thermal management system is controlled to circulate cooling of the energy storage battery with a second cooling power. The first cooling power is less than the second cooling power. This achieves the goal of controlling the thermal management system to circulate cooling the energy storage battery with a higher cooling power in the event of thermal runaway, which can quickly reduce the battery temperature and help reduce the safety risks of the energy storage battery.

[0064] In the absence of thermal runaway in the energy storage battery and when the sampling parameters are abnormal, controlling the thermal management system to circulate and cool the energy storage battery with a smaller cooling power can suppress the problem of the energy storage battery being severely damaged due to temperature rise before thermal runaway is detected, which is conducive to further reducing the safety risks of the energy storage battery.

[0065] If the energy storage battery does not experience thermal runaway and the sampling temperature is less than or equal to the temperature threshold, the thermal management system stops working, reducing the power consumption of the battery system and improving the energy efficiency of the battery system.

[0066] The technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings.

[0067] Please see Figure 1 This illustration shows an application scenario diagram of the battery system provided in the embodiments of this application. The battery system may include an energy storage battery 100, a thermal management system 200, and a main control device 300.

[0068] The battery system can be any of the following, including but not limited to energy storage systems or electric vehicles.

[0069] The energy storage battery 100 can be used to provide electrical energy to the battery system. The energy storage battery 100 can be any of the following, including but not limited to lithium batteries, lead-acid batteries, nickel-cadmium batteries, nickel-metal hydride batteries, zinc-silver batteries, iron-chromium flow batteries, and vanadium redox flow batteries.

[0070] The thermal management system 200 can be used to circulate and cool the energy storage battery 100. The thermal management system 200 can be, but is not limited to, at least one of a steam circulation cooling system or a liquid circulation cooling system.

[0071] As an example, a liquid circulating cooling system may include a storage tank, coolant, and a circulating pump. The storage tank can be used to store coolant, and the circulating pump can be connected to the storage tank via pipes.

[0072] The liquid storage tank may be any of the following, including but not limited to stainless steel liquid storage tanks, glass liquid storage tanks, or plastic liquid storage tanks.

[0073] The coolant can be used to circulate and cool the energy storage battery 100. The coolant can be any of the following, including but not limited to cooling water, deionized coolant, or organic coolant.

[0074] A circulation pump can be used to circulate and pump the coolant stored in the storage tank to the pipeline at the energy storage battery 100 for circulating cooling of the energy storage battery 100.

[0075] The circulating pump can be any of the following, including but not limited to electric circulating pumps, pneumatic circulating pumps, or hydraulic circulating pumps.

[0076] The main control device 300 can be communicatively connected to the thermal management system 200 and used to control the thermal management system 200 to circulate and cool the energy storage battery 100.

[0077] The main control device 300 may include, but is not limited to, any one of the following: a vehicle control unit (VCU) or an energy storage controller.

[0078] Energy storage controllers can be any of the following, including but not limited to servers or terminal devices.

[0079] Servers can include, but are not limited to, independent physical servers, server clusters or distributed systems consisting of multiple physical servers, and cloud servers.

[0080] Terminal devices may include, but are not limited to, mobile terminal devices (e.g., mobile phones, PDAs, tablet PCs, laptops, smartwatches, smart bracelets, etc.) or fixed terminal devices (e.g., desktop computers, smart panels, all-in-one computers, etc.).

[0081] In some implementations, the battery system may also include a battery management system (BMS) 400, which is communicatively connected to the main control device 300 and interacts with the main control device 300. The BMS 400 can be used to sample parameters of the battery system to obtain multiple sampled parameters.

[0082] The sampling parameters may include, but are not limited to, any one of the following: sampling voltage, sampling current, sampling temperature, sampling air pressure, sampling smoke concentration, or abnormal sampling frequency.

[0083] In some embodiments, the battery system may also include a low-voltage power supply 500, which is communicatively connected to the main control device 300 and interacts with the main control device 300. The low-voltage power supply 500 may also be electrically connected to the thermal management system 200.

[0084] Please see Figure 2 This document illustrates a flowchart of a thermal runaway control method provided in one embodiment of this application. In a specific embodiment, the thermal runaway control method can be applied to, for example... Figure 1 The main control device 300 in the battery system shown below will be used as an example to explain... Figure 2 The process shown is described in detail. The thermal runaway control method may include the following steps 101 to 104.

[0085] Step 101: Obtain the pre-activation request of the thermal management system of the battery system.

[0086] In this embodiment of the application, the main control device can obtain a pre-start request from the thermal management system of the battery system. The pre-start request can be used to instruct the main control device to control the thermal management system to start working.

[0087] Among them, the pre-opening request can be used to characterize that the energy storage battery of the battery system has met the thermal runaway early warning conditions but has not met the thermal runaway alarm conditions.

[0088] The thermal runaway early warning condition can be that at least one of the multiple sampling parameters of the battery system is an abnormal parameter, and the thermal runaway alarm condition can be that each of the multiple sampling parameters is an abnormal parameter.

[0089] An abnormal sampling parameter indicates that the sampling parameter is greater than the corresponding parameter threshold. The parameter threshold can be used to characterize the maximum sampling parameter of the energy storage battery in a non-thermal runaway state.

[0090] In some implementations, the battery system may also include a BMS. The main control device can acquire multiple sampling parameters collected by the BMS, and generate a pre-opening request when multiple sampling parameters meet the thermal runaway warning conditions but do not meet the thermal runaway alarm conditions. Generating a pre-opening request when multiple sampling parameters meet the thermal runaway warning conditions but do not meet the thermal runaway alarm conditions helps to improve the accuracy of obtaining the pre-opening request.

[0091] If multiple sampling parameters meet the thermal runaway early warning conditions but do not meet the thermal runaway alarm conditions, it means that at least one of the multiple sampling parameters is an abnormal parameter and at least one of the multiple sampling parameters is a normal parameter.

[0092] Regarding the process by which the main control device acquires multiple sampling parameters collected by the BMS, as one implementation method, the main control device can send a first acquisition command to the BMS, the BMS receives and responds to the first acquisition command, and sends multiple sampling parameters of the battery system collected to the main control device, and the main control device receives multiple sampling parameters returned by the BMS.

[0093] Regarding the process by which the main control device acquires multiple sampling parameters collected by the BMS, as one implementation method, the BMS can periodically report multiple sampling parameters of the battery system to the main control device, and the main control device receives the multiple sampling parameters reported by the BMS.

[0094] In some implementations, the battery system may further include a battery management system (BMS). The BMS can sample parameters of the battery system to obtain multiple sampled parameters. If it is determined that the multiple sampled parameters meet the thermal runaway warning conditions but do not meet the thermal runaway alarm conditions, the BMS generates a pre-opening request and reports the pre-opening request to the main control device. The main control device receives the pre-opening request reported by the BMS and obtains the pre-opening request from the BMS. The pre-opening request is generated by the BMS based on the determination that the multiple sampled parameters meet the thermal runaway warning conditions but do not meet the thermal runaway alarm conditions, which helps to improve the accuracy of obtaining the pre-opening request.

[0095] Step 102: In response to the pre-start request, control the thermal management system to circulate and cool the energy storage battery with a first cooling power.

[0096] In this embodiment, the main control device can send a first control command to the thermal management system in response to a pre-start request. The thermal management system receives and responds to the first control command and performs cyclic cooling on the energy storage battery with a first cooling power.

[0097] In some implementations, the thermal management system can be a liquid circulation cooling system. The main control device can send a first control command to the circulation pump in the liquid circulation cooling system in response to a pre-start request. The circulation pump receives and responds to the first control command and controls the coolant to circulate and cool the energy storage battery at a first flow rate with a first cooling power.

[0098] In some implementations, the thermal management system can be a steam circulation cooling system. The main control device can send a first control command to the steam circulation cooling system in response to a pre-start request. The steam circulation cooling system receives and responds to the first control command and circulates cooling to the energy storage battery with a first cooling power.

[0099] Step 103: If the energy storage battery does not meet the thermal runaway alarm conditions and the sampling temperature of multiple sampling parameters is less than or equal to the temperature threshold, control the thermal management system to stop circulating cooling the energy storage battery.

[0100] In this embodiment, when the energy storage battery does not meet the thermal runaway alarm conditions and the sampling temperature among multiple sampling parameters is less than or equal to the temperature threshold, the main control device can send a second control command to the thermal management system. The thermal management system receives and responds to the second control command, and stops cyclically cooling the energy storage battery. This achieves the goal of controlling the thermal management system to stop working when the energy storage battery does not experience thermal runaway and the sampling temperature is less than or equal to the temperature threshold, thereby reducing the power consumption of the battery system and improving the energy efficiency of the battery system.

[0101] The temperature threshold can be used to characterize the maximum sampling temperature at which the energy storage battery is in a safe state. The temperature threshold may include, but is not limited to, a temperature preset by the user, or a temperature automatically generated by the main control device based on multiple thermal runaway control processes.

[0102] In some implementations, the thermal management system can be a liquid circulation cooling system. When the energy storage battery does not meet the thermal runaway alarm conditions and the sampled temperature among multiple sampling parameters is less than or equal to the temperature threshold, the main control device can send a second control command to the circulation pump in the liquid circulation cooling system. The circulation pump receives and responds to the second control command and stops working, so that the coolant stops circulating and cooling the energy storage battery.

[0103] In some implementations, the thermal management system can be a steam circulation cooling system. When the energy storage battery does not meet the thermal runaway alarm conditions and the sampling temperature among multiple sampling parameters is less than or equal to the temperature threshold, the main control device can send a second control command to the steam circulation cooling system. The steam circulation cooling system receives and responds to the second control command and stops circulating cooling the energy storage battery.

[0104] Step 104: If the energy storage battery meets the thermal runaway alarm conditions within a preset time period, control the thermal management system to circulate and cool the energy storage battery with the second cooling power.

[0105] In this embodiment, if the main control device determines that the energy storage battery has met the thermal runaway alarm conditions within a preset time period, it can send a third control command to the thermal management system. The thermal management system receives and responds to the third control command and performs cyclic cooling of the energy storage battery with a second cooling power. This enables the thermal management system to perform cyclic cooling of the energy storage battery with a larger cooling power in the event of thermal runaway, which can quickly reduce the battery temperature of the energy storage battery and help reduce the safety risks of the energy storage battery.

[0106] In the absence of thermal runaway in the energy storage battery and when the sampling parameters are abnormal, controlling the thermal management system to circulate and cool the energy storage battery with a smaller cooling power can suppress the problem of the energy storage battery being severely damaged due to temperature rise before thermal runaway is detected, which is conducive to further reducing the safety risks of the energy storage battery.

[0107] If the energy storage battery does not experience thermal runaway and the sampling temperature is less than or equal to the temperature threshold, the thermal management system stops working, reducing the power consumption of the battery system and improving the energy efficiency of the battery system.

[0108] Specifically, if the main control device determines that the energy storage battery has met the thermal runaway alarm conditions within a preset time period, and the sampled temperature is greater than the temperature threshold, the first cooling power can be less than the second cooling power. The preset time period may include, but is not limited to, a user-preset time period, or a time period automatically generated by the main control device based on multiple thermal runaway control processes.

[0109] As an example, the preset duration can be any of 5 minutes or 10 minutes.

[0110] In some implementations, the first cooling power can also be equal to the second cooling power, indicating that before the energy storage battery experiences thermal runaway, the thermal management system is controlled to cool the energy storage battery with a larger cooling power, further improving the safety of the energy storage battery.

[0111] In some implementations, the thermal management system can be a liquid circulation cooling system. If the main control device determines within a preset time period that the energy storage battery has met the thermal runaway alarm conditions, it can send a third control command to the circulation pump in the liquid circulation cooling system. The circulation pump receives and responds to the third control command, and controls the coolant to circulate and cool the energy storage battery at a second flow rate with a second cooling power.

[0112] The first flow rate can be less than the second flow rate.

[0113] In some implementations, the thermal management system can be a steam circulation cooling system. If the main control device determines within a preset time period that the energy storage battery has met the thermal runaway alarm conditions, it can send a third control command to the steam circulation cooling system. The steam circulation cooling system receives and responds to the third control command and uses a second cooling power to circulate and cool the energy storage battery.

[0114] In some implementations, when the main control device determines that the energy storage battery has met the thermal runaway alarm conditions, it can generate and send alarm information to the user's associated preset client to remind the user to handle the energy storage battery, which helps to improve the operational safety of the battery system.

[0115] The alarm information may include, but is not limited to, at least one of the following: sound alarm information, text alarm information, or light alarm information.

[0116] The default client can be any of the following, including but not limited to mobile clients (e.g., mobile phone clients, PDA clients, Tablet PC clients, laptop clients, smartwatch clients, smart bracelet clients, or wearable clients) or fixed clients (e.g., desktop computer clients, smart panel clients).

[0117] The solution provided in this application obtains a pre-start request from the thermal management system of the battery system. The pre-start request indicates that the energy storage battery of the battery system has met the thermal runaway warning condition but has not met the thermal runaway alarm condition. The thermal runaway warning condition is that at least one of the multiple sampling parameters of the battery system is an abnormal parameter, and the thermal runaway alarm condition is that each of the multiple sampling parameters is an abnormal parameter. In response to the pre-start request, the thermal management system is controlled to circulate cooling of the energy storage battery with a first cooling power. If the energy storage battery does not meet the thermal runaway alarm condition and the sampling temperature of the multiple sampling parameters is less than or equal to a temperature threshold, the thermal management system is controlled to stop circulating cooling of the energy storage battery. If, within a preset time period, it is determined that the energy storage battery has met the thermal runaway alarm condition, the thermal management system is controlled to circulate cooling of the energy storage battery with a second cooling power. The first cooling power is less than the second cooling power. This achieves the goal of controlling the thermal management system to circulate cooling of the energy storage battery with a larger cooling power in the event of thermal runaway, which can quickly reduce the battery temperature and help reduce the safety risks of the energy storage battery.

[0118] In the absence of thermal runaway in the energy storage battery and when the sampling parameters are abnormal, controlling the thermal management system to circulate and cool the energy storage battery with a smaller cooling power can suppress the problem of the energy storage battery being severely damaged due to temperature rise before thermal runaway is detected, which is conducive to further reducing the safety risks of the energy storage battery.

[0119] If the energy storage battery does not experience thermal runaway and the sampling temperature is less than or equal to the temperature threshold, the thermal management system stops working, reducing the power consumption of the battery system and improving the energy efficiency of the battery system.

[0120] Please see Figure 3 This illustrates a flowchart of a thermal runaway control method provided in another embodiment of this application. In a specific embodiment, the thermal runaway control method can be applied to, for example... Figure 1 The main control device 300 in the battery system shown below will be used as an example to explain... Figure 3 The process shown is described in detail. The thermal runaway control method may include the following steps 201 to 203.

[0121] Step 201: Obtain the pre-activation request of the thermal management system of the battery system.

[0122] Step 202: In response to the pre-start request, control the thermal management system to circulate and cool the energy storage battery with a first cooling power.

[0123] In this embodiment, steps 201 and 202 can be referred to the corresponding steps in the previous embodiments, and will not be repeated here.

[0124] Step 203: If the energy storage battery fails to meet the thermal runaway alarm conditions within a preset time period, control the thermal management system to stop circulating cooling the energy storage battery.

[0125] In this embodiment, if the main control device determines that the energy storage battery does not meet the thermal runaway alarm conditions within a preset time period, it can send a fourth control command to the thermal management system. The thermal management system receives and responds to the fourth control command and stops cyclically cooling the energy storage battery. This enables the thermal management system to stop working if the energy storage battery does not experience thermal runaway within the preset time period, thereby reducing the power consumption of the battery system and improving the energy efficiency of the battery system.

[0126] In some implementations, the thermal management system can be a liquid circulation cooling system. If the main control device determines within a preset time period that the energy storage battery does not meet the thermal runaway alarm conditions, it can send a fourth control command to the circulation pump in the liquid circulation cooling system. The circulation pump receives and responds to the fourth control command and stops working, so that the coolant stops circulating and cooling the energy storage battery.

[0127] In some implementations, the thermal management system can be a steam circulation cooling system. If the main control device determines within a preset time period that the energy storage battery does not meet the thermal runaway alarm conditions, it can send a fourth control command to the steam circulation cooling system. The steam circulation cooling system receives and responds to the fourth control command and stops circulating cooling the energy storage battery.

[0128] In one application scenario, such as Figure 4 As shown, the thermal runaway control method may include the following steps 301 to 305.

[0129] Step 301: Obtain the pre-activation request of the thermal management system of the battery system.

[0130] Step 302: In response to the pre-start request, control the thermal management system to circulate and cool the energy storage battery with a first cooling power.

[0131] Step 303: If the energy storage battery does not meet the thermal runaway alarm conditions and the sampling temperature of multiple sampling parameters is less than or equal to the temperature threshold, control the thermal management system to stop circulating cooling of the energy storage battery.

[0132] Step 304: If the energy storage battery meets the thermal runaway alarm conditions within a preset time period, control the thermal management system to circulate and cool the energy storage battery with the second cooling power.

[0133] Step 305: If the energy storage battery does not meet the thermal runaway alarm conditions within the preset time period, control the thermal management system to stop circulating cooling the energy storage battery.

[0134] The solution provided in this embodiment obtains the pre-start request of the thermal management system of the battery system, and in response to the pre-start request, controls the thermal management system to circulate and cool the energy storage battery with a first cooling power. If it is determined within a preset time that the energy storage battery does not meet the thermal runaway alarm conditions, the thermal management system stops circulating and cooling the energy storage battery. This achieves the goal of controlling the thermal management system to circulate and cool the energy storage battery with a smaller cooling power when the energy storage battery has not experienced thermal runaway and the sampling parameters are abnormal. This can suppress the problem of the energy storage battery being seriously damaged due to temperature rise before thermal runaway is detected, which is beneficial to reducing the safety risk of the energy storage battery.

[0135] If the energy storage battery does not experience thermal runaway within a preset time, the thermal management system will stop working, reducing the power consumption of the battery system and improving the energy efficiency of the battery system.

[0136] Please see Figure 5This illustrates a flowchart of a thermal runaway control method provided in another embodiment of this application. In a specific embodiment, the thermal runaway control method can be applied to, for example... Figure 1 The VCU shown in the electric vehicle will be used as an example below to explain... Figure 5 The process shown is described in detail. The thermal runaway control method may include the following steps 401 to 406.

[0137] Step 401: Obtain the pre-activation request of the thermal management system of the electric vehicle.

[0138] Step 402: In response to the pre-start request, control the thermal management system to circulate and cool the energy storage battery at a first cooling power.

[0139] Step 403: If the energy storage battery does not meet the thermal runaway alarm conditions and the sampling temperature of multiple sampling parameters is less than or equal to the temperature threshold, control the thermal management system to stop circulating cooling of the energy storage battery.

[0140] Step 404: If the energy storage battery meets the thermal runaway alarm conditions within a preset time period, control the thermal management system to circulate and cool the energy storage battery with the second cooling power.

[0141] In this embodiment, steps 401, 402, 403 and 404 can be found in the corresponding steps in the foregoing embodiments, and will not be repeated here.

[0142] Step 405: Determine the vehicle status of the electric vehicle.

[0143] In this embodiment, the electric vehicle may also include a speedometer, which is communicatively connected to the VCU and interacts with the VCU for data exchange. The speedometer can be used to measure the speed of the electric vehicle.

[0144] The VCU can send a second acquisition command to the speedometer. The speedometer receives and responds to the second acquisition command, measures the speed of the electric vehicle, and sends the speed to the VCU. The VCU receives and responds to the speed returned by the speedometer, and determines the vehicle status of the electric vehicle based on the speed.

[0145] The vehicle status can include both driving status and parking status.

[0146] When the vehicle speed is greater than 0, the vehicle status of the electric vehicle is determined to be in a driving state; when the vehicle speed is equal to 0, the vehicle status of the electric vehicle is determined to be in a parked state.

[0147] Step 406: If the vehicle is determined to be in a driving state, control the braking system of the electric vehicle to brake the electric vehicle.

[0148] In this embodiment, the electric vehicle may further include a braking system, which is communicatively connected to the VCU and interacts with the VCU for data exchange. The braking system can be used to brake the electric vehicle.

[0149] When the VCU determines that the vehicle is in a driving state, it can send a fifth control command to the braking system. The braking system receives and responds to the fifth control command and brakes the electric vehicle. This enables braking control of the electric vehicle even when the energy storage battery experiences thermal runaway and the electric vehicle is in a driving state. This can suppress the occurrence of collision accidents caused by thermal runaway of the electric vehicle and improve the driving safety of the electric vehicle.

[0150] The solution provided in this embodiment obtains a pre-activation request from the thermal management system of the electric vehicle and, in response to the pre-activation request, controls the thermal management system to circulate cooling of the energy storage battery with a first cooling power. If the energy storage battery does not meet the thermal runaway alarm conditions and the sampled temperature among multiple sampling parameters is less than or equal to the temperature threshold, the thermal management system stops circulating cooling of the energy storage battery. If, within a preset time period, it is determined that the energy storage battery has met the thermal runaway alarm conditions, the thermal management system is controlled to circulate cooling of the energy storage battery with a second cooling power. The vehicle status of the electric vehicle is determined, and if the vehicle status is determined to be in a driving state, the braking system of the electric vehicle is controlled to brake the electric vehicle. This achieves the goal of controlling the thermal management system to circulate cooling of the energy storage battery with a larger cooling power in the event of thermal runaway, which can quickly reduce the battery temperature of the energy storage battery and help reduce the safety risks of the energy storage battery.

[0151] In the absence of thermal runaway in the energy storage battery and when the sampling parameters are abnormal, controlling the thermal management system to circulate and cool the energy storage battery with a smaller cooling power can suppress the problem of the energy storage battery being severely damaged due to temperature rise before thermal runaway is detected, which is conducive to further reducing the safety risks of the energy storage battery.

[0152] When the energy storage battery of an electric vehicle experiences thermal runaway while the vehicle is in motion, applying braking control can prevent collisions caused by thermal runaway and improve the driving safety of the electric vehicle.

[0153] Please see Figure 6 This illustrates a flowchart of a thermal runaway control method provided in another embodiment of this application. In a specific embodiment, the thermal runaway control method can be applied to, for example... Figure 1 The main control device 300 in the battery system shown below will be used as an example to explain... Figure 6The process shown is described in detail. The thermal runaway control method may include the following steps 501 to 505.

[0154] Step 501: Obtain the pre-activation request of the thermal management system of the battery system.

[0155] In this embodiment, step 501 can refer to the corresponding steps in the previous embodiments, and will not be repeated here.

[0156] Step 502: Control the low-voltage power supply or high-voltage power supply of the battery system or the engine to supply power to the thermal management system so that the thermal management system switches from the off state to the working state.

[0157] In this embodiment, the battery system may further include a low-voltage power supply, a high-voltage power supply, and an engine. The main control device may send a sixth control command to the low-voltage power supply, the high-voltage power supply, or the engine. The low-voltage power supply, the high-voltage power supply, or the engine receives and responds to the sixth control command, supplying power to the thermal management system so that the thermal management system switches from a shutdown state to an operating state. Before a thermal runaway warning occurs, the battery system controls the thermal management system to be in a power-off state, which can reduce the power consumption of the battery system. In the event of a thermal runaway warning, the battery system controls the low-voltage power supply, the high-voltage power supply, or the engine to provide power to the thermal management system so that the thermal management system switches from a shutdown state to an operating state, which helps to improve the control success rate of the thermal management system.

[0158] Step 503: In response to the pre-start request, control the thermal management system to circulate and cool the energy storage battery at a first cooling power.

[0159] Step 504: If the energy storage battery does not meet the thermal runaway alarm conditions and the sampling temperature of multiple sampling parameters is less than or equal to the temperature threshold, control the thermal management system to stop circulating cooling the energy storage battery.

[0160] Step 505: If the energy storage battery meets the thermal runaway alarm conditions within a preset time period, control the thermal management system to circulate and cool the energy storage battery with the second cooling power.

[0161] In this embodiment, steps 503, 504, and 505 can be found in the corresponding steps of the aforementioned embodiments, and will not be repeated here.

[0162] The solution provided in this embodiment obtains the pre-start request of the thermal management system of the battery system and controls the low-voltage power supply, high-voltage power supply, or engine of the battery system to supply power to the thermal management system. In response to the pre-start request, the thermal management system is controlled to circulate cooling of the energy storage battery with a first cooling power. If the energy storage battery does not meet the thermal runaway alarm conditions and the sampled temperature of multiple sampling parameters is less than or equal to the temperature threshold, the thermal management system is controlled to stop circulating cooling of the energy storage battery. If the thermal runaway alarm conditions are determined within a preset time, the thermal management system is controlled to circulate cooling of the energy storage battery with a second cooling power. This achieves the goal of controlling the thermal management system to circulate cooling of the energy storage battery with a larger cooling power in the event of thermal runaway, which can quickly reduce the battery temperature of the energy storage battery and help reduce the safety risks of the energy storage battery.

[0163] In the absence of thermal runaway in the energy storage battery and when the sampling parameters are abnormal, controlling the thermal management system to circulate and cool the energy storage battery with a smaller cooling power can suppress the problem of the energy storage battery being severely damaged due to temperature rise before thermal runaway is detected, which is conducive to further reducing the safety risks of the energy storage battery.

[0164] Before a thermal runaway warning occurs, the thermal management system is kept in a power-off state, which can reduce the power consumption of the battery system. In the event of a thermal runaway warning, the low-voltage power supply, high-voltage power supply, or engine can be controlled to provide power to the thermal management system, so that the thermal management system can switch from a shutdown state to an operating state, which helps to improve the control success rate of the thermal management system.

[0165] Please see Figure 7 This illustration shows a thermal runaway control device 700 provided in one embodiment of this application. In a specific embodiment, the thermal runaway control device 700 can be applied to, for example... Figure 1 The main control device 300 in the battery system shown below will be used as an example to explain... Figure 7 The thermal runaway control device 700 shown will be described in detail. The thermal runaway control device 700 may include an acquisition module 710, a first control module 720, a second control module 730 and a third control module 740.

[0166] The acquisition module 710 can be used to acquire a pre-start request from the thermal management system of the battery system. The pre-start request can be used to indicate that the energy storage battery of the battery system has met the thermal runaway warning condition but has not met the thermal runaway alarm condition. The thermal runaway warning condition can be that at least one of the multiple sampling parameters of the battery system is an abnormal parameter, and the thermal runaway alarm condition can be that each of the multiple sampling parameters is an abnormal parameter. The first control module 720 can be used to respond to the pre-start request and control the thermal management system to perform cyclic cooling of the energy storage battery with a first cooling power. The second control module 730 can be used to control the thermal management system to stop cyclic cooling of the energy storage battery when the energy storage battery has not met the thermal runaway alarm condition and the sampling temperature of the multiple sampling parameters is less than or equal to a temperature threshold. The third control module 740 can be used to control the thermal management system to perform cyclic cooling of the energy storage battery with a second cooling power when it is determined within a preset time that the energy storage battery has met the thermal runaway alarm condition. The first cooling power can be less than the second cooling power.

[0167] In some embodiments, the thermal runaway control device 700 may also include a fourth control module.

[0168] The fourth control module can be used to control the thermal management system to stop circulating cooling of the energy storage battery if it is determined within a preset time period that the energy storage battery does not meet the thermal runaway alarm conditions.

[0169] In some implementations, the battery system may be an energy storage vehicle, and the thermal runaway control device 700 may further include a determination module and a fifth control module.

[0170] The determination module can be used by the second control module 730 to determine the vehicle status of the electric vehicle after the thermal management system circulates and cools the energy storage battery with the second cooling power when the energy storage battery meets the thermal runaway alarm conditions within a preset time period; the fifth control module can be used to control the braking system of the electric vehicle to brake the electric vehicle when the vehicle status is determined to be driving.

[0171] In some embodiments, the thermal runaway control device 700 may also include a sixth control module.

[0172] The sixth control module can be used to control the low-voltage power supply or high-voltage power supply or engine of the battery system to supply power to the thermal management system before the first control module 720 responds to the pre-start request and controls the thermal management system to circulate and cool the energy storage battery with the first cooling power, so as to switch the thermal management system from the shutdown state to the working state.

[0173] In some implementations, the acquisition module 710 may include an acquisition unit and a generation unit.

[0174] The acquisition unit can be used to acquire multiple sampling parameters collected by the battery management system; the generation unit can be used to generate a pre-opening request when multiple sampling parameters have met the thermal runaway early warning conditions but have not met the thermal runaway alarm conditions.

[0175] In some implementations, the acquisition module 710 may further include a receiving unit.

[0176] The receiving unit can be used to receive pre-start requests reported by the battery management system. The pre-start request can be generated by the battery management system when it determines that multiple collected sampling parameters have met the thermal runaway early warning conditions but have not met the thermal runaway alarm conditions.

[0177] In some embodiments, the thermal runaway control device 700 may also include a generation module.

[0178] The generation module can be used to generate and send alarm information to a preset client when it is determined that the energy storage battery has met the thermal runaway alarm conditions.

[0179] The solution provided in this embodiment obtains a pre-start request from the thermal management system of the battery system. The pre-start request indicates that the energy storage battery of the battery system has met the thermal runaway warning condition but has not met the thermal runaway alarm condition. The thermal runaway warning condition is that at least one of the multiple sampling parameters of the battery system is an abnormal parameter, and the thermal runaway alarm condition is that each of the multiple sampling parameters is an abnormal parameter. In response to the pre-start request, the thermal management system is controlled to circulate cooling of the energy storage battery with a first cooling power. If the energy storage battery does not meet the thermal runaway alarm condition and the sampling temperature of the multiple sampling parameters is less than or equal to a temperature threshold, the thermal management system is controlled to stop circulating cooling of the energy storage battery. If it is determined within a preset time that the energy storage battery has met the thermal runaway alarm condition, the thermal management system is controlled to circulate cooling of the energy storage battery with a second cooling power. The first cooling power is less than the second cooling power. This achieves the goal of controlling the thermal management system to circulate cooling of the energy storage battery with a larger cooling power in the event of thermal runaway, which can quickly reduce the battery temperature and help reduce the safety risks of the energy storage battery.

[0180] In the absence of thermal runaway in the energy storage battery and when the sampling parameters are abnormal, controlling the thermal management system to circulate and cool the energy storage battery with a smaller cooling power can suppress the problem of the energy storage battery being severely damaged due to temperature rise before thermal runaway is detected, which is conducive to further reducing the safety risks of the energy storage battery.

[0181] If the energy storage battery does not experience thermal runaway and the sampling temperature is less than or equal to the temperature threshold, the thermal management system stops working, reducing the power consumption of the battery system and improving the energy efficiency of the battery system.

[0182] It should be noted that the various embodiments in this specification are described in a progressive manner, with each embodiment focusing on its differences from other embodiments. Similar or identical parts between embodiments can be referred to interchangeably. For device embodiments, since they are basically similar to method embodiments, the description is relatively simple; relevant parts can be referred to in the descriptions of the method embodiments. Any processing method described in the method embodiments can be implemented in the device embodiments through corresponding processing modules, and will not be elaborated upon further in the device embodiments.

[0183] Furthermore, the functional modules in the various embodiments of this application can be integrated into one processing module, or each module can exist physically separately, or two or more modules can be integrated into one module. The integrated modules described above can be implemented in hardware or as software functional modules.

[0184] Please see Figure 8 The diagram illustrates a functional block diagram of a battery system 800 provided in one embodiment of the present application. The battery system 800 may include one or more of the following components: a memory 810, a processor 820, and one or more application programs. One or more application programs may be stored in the memory 810 and configured to be executed by one or more processors 820. One or more application programs are configured to perform the methods as described in the foregoing method embodiments.

[0185] The memory 810 may include random access memory (RAM) or read-only memory (ROM). The memory 810 may be used to store instructions, programs, code, code sets, or instruction sets. The memory 810 may include a program storage area and a data storage area. The program storage area may store instructions for implementing an operating system, instructions for implementing at least one function (such as acquiring a pre-activation request, responding to a pre-activation request, controlling cooling at a first cooling power, controlling cooling at a second cooling power, controlling cooling to stop, determining vehicle status, controlling braking, controlling power supply, acquiring multiple sampling parameters, collecting multiple sampling parameters, generating a pre-activation request, receiving a pre-activation request, reporting a pre-activation request, generating alarm information, and sending alarm information, etc.), and instructions for implementing the various method embodiments described below. The storage data area can also store data created by the battery system 800 during use (such as battery system, thermal management system, pre-start request, energy storage battery, thermal runaway warning conditions, thermal runaway alarm conditions, multiple sampling parameters, abnormal parameters, first cooling power, preset duration, second cooling power, target sampling parameters, target parameter threshold, electric vehicle, vehicle status, driving status, braking system, low voltage power supply, high voltage power supply, engine, battery management system, alarm information, and preset client).

[0186] The processor 820 may include one or more processing cores. The processor 820 connects to various parts of the battery system 800 using various interfaces and lines, and performs various functions and processes data of the battery system 800 by running or executing instructions, programs, code sets, or instruction sets stored in the memory 810, and by calling data stored in the memory 810. Optionally, the processor 820 may be implemented using at least one hardware form of Digital Signal Processing (DSP), Field-Programmable Gate Array (FPGA), or Programmable Logic Array (PLA). The processor 820 may integrate one or a combination of several of the following: Central Processing Unit (CPU), Graphics Processing Unit (GPU), and modem. The CPU primarily handles the operating system, user interface, and applications; the GPU is responsible for rendering and drawing the displayed content; and the modem handles wireless communication. It is understood that the modem may also not be integrated into the processor 820 and may be implemented separately using a communication chip.

[0187] Please refer to Figure 9 This diagram illustrates a structural block diagram of a computer-readable storage medium provided in an embodiment of this application. The computer-readable storage medium 900 stores program code 910, which can be called by a processor to execute the methods described in the above method embodiments.

[0188] The computer-readable storage medium 900 may be an electronic memory such as flash memory, EEPROM (Electrically Erasable Programmable Read-Only Memory), EPROM, hard disk, or ROM. Optionally, the computer-readable storage medium 900 includes a non-transitory computer-readable storage medium. The computer-readable storage medium 900 has storage space for program code 910 that performs any of the method steps described above. This program code can be read from or written to one or more computer program products. The program code 910 may be compressed, for example, in a suitable form.

[0189] Please refer to Figure 10 This diagram illustrates a structural block diagram of a computer program product 1000 provided in an embodiment of this application. The computer program product 1000 includes a computer program / instructions 1010, which is stored in a computer-readable storage medium of a computer device. When the computer program product 1000 runs on the computer device, the processor of the computer device reads the computer program / instructions 1010 from the computer-readable storage medium, and executes the computer program / instructions 1010, causing the computer device to perform the methods described in the above method embodiments.

[0190] The solution provided in this embodiment obtains a pre-start request from the thermal management system of the battery system. The pre-start request indicates that the energy storage battery of the battery system has met the thermal runaway warning condition but has not met the thermal runaway alarm condition. The thermal runaway warning condition is that at least one of the multiple sampling parameters of the battery system is an abnormal parameter, and the thermal runaway alarm condition is that each of the multiple sampling parameters is an abnormal parameter. In response to the pre-start request, the thermal management system is controlled to circulate cooling of the energy storage battery with a first cooling power. If the energy storage battery does not meet the thermal runaway alarm condition and the sampling temperature of the multiple sampling parameters is less than or equal to a temperature threshold, the thermal management system is controlled to stop circulating cooling of the energy storage battery. If it is determined within a preset time that the energy storage battery has met the thermal runaway alarm condition, the thermal management system is controlled to circulate cooling of the energy storage battery with a second cooling power. The first cooling power is less than the second cooling power. This achieves the goal of controlling the thermal management system to circulate cooling of the energy storage battery with a larger cooling power in the event of thermal runaway, which can quickly reduce the battery temperature and help reduce the safety risks of the energy storage battery.

[0191] In the absence of thermal runaway in the energy storage battery and when the sampling parameters are abnormal, controlling the thermal management system to circulate and cool the energy storage battery with a smaller cooling power can suppress the problem of the energy storage battery being severely damaged due to temperature rise before thermal runaway is detected, which is conducive to further reducing the safety risks of the energy storage battery.

[0192] If the energy storage battery does not experience thermal runaway and the sampling temperature is less than or equal to the temperature threshold, the thermal management system stops working, reducing the power consumption of the battery system and improving the energy efficiency of the battery system.

[0193] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application.

Claims

1. A method for controlling thermal runaway, characterized in that, include: A pre-start request for the thermal management system of the battery system is obtained. The pre-start request indicates that the energy storage battery of the battery system has met the thermal runaway warning condition but has not met the thermal runaway alarm condition. The thermal runaway warning condition is that at least one of the multiple sampling parameters of the battery system is an abnormal parameter. The thermal runaway alarm condition is that each of the multiple sampling parameters is the abnormal parameter. The pre-start request is generated based on the battery management system detecting that at least one sampling parameter is abnormal but not all sampling parameters are abnormal. The sampling parameter being an abnormal parameter indicates that the sampling parameter is greater than the corresponding parameter threshold. The parameter threshold is used to characterize the maximum sampling parameter of the energy storage battery in a non-thermal runaway state. In response to the pre-activation request, the thermal management system is controlled to circulate and cool the energy storage battery at a first cooling power. If the energy storage battery does not meet the thermal runaway alarm conditions and the sampling temperature among the plurality of sampling parameters is less than or equal to the temperature threshold, the thermal management system is controlled to stop circulating cooling of the energy storage battery, wherein the temperature threshold is used to characterize the maximum sampling temperature at which the energy storage battery is in a safe state. If the energy storage battery meets the thermal runaway alarm condition within a preset time period, the thermal management system is controlled to circulate and cool the energy storage battery with a second cooling power, wherein the first cooling power is less than the second cooling power. If, within the preset time period, it is determined that the energy storage battery does not meet the thermal runaway alarm conditions, the thermal management system is controlled to stop circulating cooling of the energy storage battery.

2. The thermal runaway control method according to claim 1, characterized in that, The battery system is an electric vehicle. After determining that the energy storage battery has met the thermal runaway alarm conditions within a preset time period, and controlling the thermal management system to circulate and cool the energy storage battery with a second cooling power, the thermal runaway control method further includes: Determine the vehicle status of the electric vehicle; When the vehicle is determined to be in a driving state, the braking system of the electric vehicle is controlled to brake the electric vehicle.

3. The thermal runaway control method according to any one of claims 1 to 2, characterized in that, Before controlling the thermal management system to circulate and cool the energy storage battery at a first cooling power in response to the pre-activation request, the thermal runaway control method further includes: The low-voltage power supply or high-voltage power supply or engine of the battery system is controlled to supply power to the thermal management system, so that the thermal management system switches from the shutdown state to the working state.

4. The thermal runaway control method according to any one of claims 1 to 2, characterized in that, The process of obtaining a pre-start request for the thermal management system of the battery system includes: Obtain the multiple sampling parameters collected by the battery management system; If the multiple sampling parameters meet the thermal runaway early warning conditions but do not meet the thermal runaway alarm conditions, the pre-activation request is generated.

5. The thermal runaway control method according to any one of claims 1 to 2, characterized in that, The process of obtaining a pre-start request for the thermal management system of the battery system includes: The battery management system receives a pre-activation request, which is generated by the battery management system based on the condition that the collected sampling parameters meet the thermal runaway early warning conditions but do not meet the thermal runaway alarm conditions.

6. The thermal runaway control method according to any one of claims 1 to 2, characterized in that, Also includes: If it is determined that the energy storage battery has met the thermal runaway alarm conditions, an alarm message is generated and sent to a preset client.

7. A thermal runaway control device, characterized in that, include: The acquisition module is used to acquire a pre-start request from the thermal management system of the battery system. The pre-start request indicates that the energy storage battery of the battery system has met the thermal runaway warning condition but has not met the thermal runaway alarm condition. The thermal runaway warning condition is that at least one of the multiple sampling parameters of the battery system is an abnormal parameter, and the thermal runaway alarm condition is that each of the multiple sampling parameters is the abnormal parameter. The pre-start request is generated based on the battery management system detecting that at least one sampling parameter is abnormal but not all sampling parameters are abnormal. An abnormal sampling parameter indicates that the sampling parameter is greater than the corresponding parameter threshold. The parameter threshold is used to characterize the maximum sampling parameter of the energy storage battery in a non-thermal runaway state. The first control module is configured to, in response to the pre-activation request, control the thermal management system to circulate and cool the energy storage battery with a first cooling power. The second control module is used to control the thermal management system to stop cyclically cooling the energy storage battery when the energy storage battery does not meet the thermal runaway alarm conditions and the sampling temperature among the plurality of sampling parameters is less than or equal to a temperature threshold. The temperature threshold is used to characterize the maximum sampling temperature at which the energy storage battery is in a safe state. The third control module is used to control the thermal management system to circulate and cool the energy storage battery with a second cooling power when the energy storage battery meets the thermal runaway alarm conditions within a preset time period, wherein the first cooling power is less than the second cooling power. The fourth control module is used to control the thermal management system to stop circulating cooling of the energy storage battery if it is determined within the preset time period that the energy storage battery does not meet the thermal runaway alarm conditions.

8. A battery system, characterized in that, include: Memory; One or more processors are coupled to the memory; One or more applications, wherein the one or more applications are stored in the memory and configured to be executed by the one or more processors, and the one or more applications are configured to perform the thermal runaway control method as described in any one of claims 1 to 6.

9. A computer-readable storage medium, characterized in that, The computer-readable storage medium contains program code that can be invoked by a processor to execute the thermal runaway control method as described in any one of claims 1 to 6.

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